chore(showcase): Add MDX Blog starter (#18950)
chore(showcase): Add MDX Blog starter (#18950)

* Update starters.yml

Add a Gatsby Starter

* Update starters.ymsl

* Update docs/starters.yml

Co-Authored-By: Sidhartha Chatterjee <b1c1d8736f20db3fb6c1c66bb1455ed43909f0d8@sidharthachatterjee.com>

* Update docs/starters.yml

Co-Authored-By: Sidhartha Chatterjee <b1c1d8736f20db3fb6c1c66bb1455ed43909f0d8@sidharthachatterjee.com>

* Update docs/starters.yml

Co-Authored-By: Sidhartha Chatterjee <b1c1d8736f20db3fb6c1c66bb1455ed43909f0d8@sidharthachatterjee.com>

* chore: format

* Update docs/starters.yml

Co-Authored-By: Sidhartha Chatterjee <b1c1d8736f20db3fb6c1c66bb1455ed43909f0d8@sidharthachatterjee.com>

gatsbyjs/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby